Interface to specify variables to use/impute/ignore.

[mayer79]

missRanger uses all factors and numeric variables in the fitting process. This is annoying if there are id variables etc. that we want to ignore during imputation. Similarly, there might be situations where there is a fixed set of variables X used to fill missing values and a set of variables Y that should be imputed. What is the neatest way to pass this info to missRanger?

Suggestion:

• impute = NULL (or character vector): Variables to impute. If NULL, use all.

• impute_by = NULL (or character vector): Variables used to impute "impute". If NULL, use all.

• impute_ignore: NULL (or character vector): Variables not to impute.

• impute_by_ignore = NULL (or character vector): Variables not used to impute.

Any input is very welcome.

[mnwright]

What about a formula interface?

The default would be . ~ ., i.e. impute all by all.

One could use something like A + B ~ C + D or . -ID -y ~ . -ID.

Wouldn't that combine all of your suggestions above in one argument?

[mayer79]

Awesome idea!

[mayer79]

Ready for cran